[nrf fromtree] net: offload: Do not need to enable TC threads for NET_OFFLOAD

Net offloading doesn't need net TC threads to be enabled as they're used
by the native stack. This fixes build if CONFIG_NET_OFFLOAD is enabled
but native stack is disabled.

Signed-off-by: Robert Lubos <[email protected]>
(cherry picked from commit bdbf7cc)

Author: rlubos

subsys/net/ip/CMakeLists.txt

@@ -19,7 +19,7 @@ zephyr_library_sources(
   )
 
 if(CONFIG_NET_OFFLOAD)
-zephyr_library_sources(net_context.c net_pkt.c net_tc.c)
+zephyr_library_sources(net_context.c net_pkt.c)
 endif()
 
 zephyr_library_sources_ifdef(CONFIG_NET_MGMT_EVENT   net_mgmt.c)

subsys/net/ip/net_private.h

@@ -86,16 +86,12 @@ extern bool net_context_is_v6only_set(struct net_context *context);
 extern bool net_context_is_recv_pktinfo_set(struct net_context *context);
 extern bool net_context_is_timestamping_set(struct net_context *context);
 extern void net_pkt_init(void);
-extern void net_tc_tx_init(void);
-extern void net_tc_rx_init(void);
 int net_context_get_local_addr(struct net_context *context,
 			       struct sockaddr *addr,
 			       socklen_t *addrlen);
 #else
 static inline void net_context_init(void) { }
 static inline void net_pkt_init(void) { }
-static inline void net_tc_tx_init(void) { }
-static inline void net_tc_rx_init(void) { }
 static inline const char *net_context_state(struct net_context *context)
 {
 	ARG_UNUSED(context);
@@ -149,6 +145,8 @@ static inline void mdns_init_responder(void) { }
 #if defined(CONFIG_NET_NATIVE)
 enum net_verdict net_ipv4_input(struct net_pkt *pkt, bool is_loopback);
 enum net_verdict net_ipv6_input(struct net_pkt *pkt, bool is_loopback);
+extern void net_tc_tx_init(void);
+extern void net_tc_rx_init(void);
 #else
 static inline enum net_verdict net_ipv4_input(struct net_pkt *pkt,
 					      bool is_loopback)
@@ -167,6 +165,9 @@ static inline enum net_verdict net_ipv6_input(struct net_pkt *pkt,
 
 	return NET_CONTINUE;
 }
+
+static inline void net_tc_tx_init(void) { }
+static inline void net_tc_rx_init(void) { }
 #endif
 extern bool net_tc_submit_to_tx_queue(uint8_t tc, struct net_pkt *pkt);
 extern void net_tc_submit_to_rx_queue(uint8_t tc, struct net_pkt *pkt);